Information Processing Apparatus, Information Recording Medium Manufacturing Apparatus, And Information Recording Medium

Abstract

A configuration is provided for enabling a process in which appropriate content code corresponding to apparatuses and applications of various model types and versions is selected to be performed. In a configuration in which content code recorded on an information recording medium is obtained, and processing, such as a security check in accordance with the content code, conversion of the content data, and embedding of player information into the content, is performed, at least a portion of the content code is set as encrypted data, and as an encryption key therefore, a node key set so as to correspond to a node of a key tree having a hierarchical structure is used. With this configuration, it is possible to specify in advance a player capable of decrypting the encryption part of the content code by using the node key, and only appropriate content code compliant with each player is processed, thereby making it possible to prevent a process of using invalid content code.

Description

TECHNICAL FIELD[0001]The present invention relates to an information processing apparatus, an information recording medium manufacturing apparatus, an information recording medium, a method, and a computer program. More particularly, the present invention relates to an information processing apparatus configured to reliably select and execute appropriate content code compliant with players, such as information processing apparatuses and reproduction applications, when performing data processing using content code as a content-use control program, which is recorded together with content on an information recording medium, an information recording medium manufacturing apparatus, an information recording medium, a method, and a computer program.BACKGROUND ART[0002]Various software data, such as audio data such as music, image data such as movies, game programs, and various kinds of application programs (hereinafter, these will be referred to as “content”), can be stored as digital data...

AI Technical Summary

Benefits of technology

[0070]According to the configuration of an embodiment of the present invention, in a configuration in which content code containing a data processing program, which is recorded on an information recording medium, is obtained, and data processing, such as a security check process in accordance with the content code, a process for converting data constituting the content, and a process for embedding player information into the content, is performed, at least some of the content code is set as encrypted data, and as an encryption key therefor, a node key set in such a manner as to correspond to a node of a key tree having a hierarchical structure is used. It is possible to specify in advance a player capable of decrypting an encrypted part of the content code by using a node key, and it is possible to process only appropriate content code compliant with each player, thereby realizing a configuration in which a process for using invalid content code is prevented.

Problems solved by technology

Therefore, when distributing these pieces of content, it is common practice that a fixed use limitation is imposed, that is, use of content is permitted only for an authorized user so that copying without permission or the like will not be performed.

Therefore, problems such as the following have occurred: the distribution of illegally copied content via the Internet, the distribution of so-called pirated discs produced using CD-Rs and the like, onto which content has been recorded, and wide use of copied content stored in a hard disk of a PC or the like.

However, even if content is encrypted, if the leakage of an encryption key occurs, a problem of illegally decrypted content being leaked can occur.

If leakage of content code occurs and the content code is illegally distributed and used, there is a possibility that many pieces of content can be illegally distributed and used, and great damages occur.

Thus, when correct content code compliant with a player is not selected, there is a problem in that correct player identification information is not embedded.

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